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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 //
      5 // This file implements common select dialog functionality between GTK and KDE.
      6 
      7 #include "ui/shell_dialogs/gtk/select_file_dialog_impl.h"
      8 
      9 #include "base/environment.h"
     10 #include "base/file_util.h"
     11 #include "base/nix/xdg_util.h"
     12 #include "base/threading/thread_restrictions.h"
     13 
     14 namespace {
     15 
     16 enum UseKdeFileDialogStatus {
     17   UNKNOWN,
     18   NO_KDE,
     19   YES_KDE
     20 };
     21 
     22 UseKdeFileDialogStatus use_kde_ = UNKNOWN;
     23 
     24 }  // namespace
     25 
     26 namespace ui {
     27 
     28 base::FilePath* SelectFileDialogImpl::last_saved_path_ = NULL;
     29 base::FilePath* SelectFileDialogImpl::last_opened_path_ = NULL;
     30 
     31 // static
     32 SelectFileDialog* CreateLinuxSelectFileDialog(
     33     SelectFileDialog::Listener* listener,
     34     SelectFilePolicy* policy) {
     35   if (use_kde_ == UNKNOWN) {
     36     // Start out assumimg we are not going to use KDE.
     37     use_kde_ = NO_KDE;
     38 
     39     // Check to see if KDE is the desktop environment.
     40     scoped_ptr<base::Environment> env(base::Environment::Create());
     41     base::nix::DesktopEnvironment desktop =
     42         base::nix::GetDesktopEnvironment(env.get());
     43     if (desktop == base::nix::DESKTOP_ENVIRONMENT_KDE3 ||
     44         desktop == base::nix::DESKTOP_ENVIRONMENT_KDE4) {
     45       // Check to see if the user dislikes the KDE file dialog.
     46       if (!env->HasVar("NO_CHROME_KDE_FILE_DIALOG")) {
     47         // Check to see if the KDE dialog works.
     48         if (SelectFileDialogImpl::CheckKDEDialogWorksOnUIThread()) {
     49           use_kde_ = YES_KDE;
     50         }
     51       }
     52     }
     53   }
     54 
     55   if (use_kde_ == NO_KDE)
     56     return SelectFileDialogImpl::NewSelectFileDialogImplGTK(listener, policy);
     57 
     58   scoped_ptr<base::Environment> env(base::Environment::Create());
     59   base::nix::DesktopEnvironment desktop =
     60       base::nix::GetDesktopEnvironment(env.get());
     61   return SelectFileDialogImpl::NewSelectFileDialogImplKDE(
     62       listener, policy, desktop);
     63 }
     64 
     65 SelectFileDialogImpl::SelectFileDialogImpl(Listener* listener,
     66                                            ui::SelectFilePolicy* policy)
     67     : SelectFileDialog(listener, policy),
     68       file_type_index_(0),
     69       type_(SELECT_NONE) {
     70   if (!last_saved_path_) {
     71     last_saved_path_ = new base::FilePath();
     72     last_opened_path_ = new base::FilePath();
     73   }
     74 }
     75 
     76 SelectFileDialogImpl::~SelectFileDialogImpl() { }
     77 
     78 void SelectFileDialogImpl::ListenerDestroyed() {
     79   listener_ = NULL;
     80 }
     81 
     82 bool SelectFileDialogImpl::IsRunning(gfx::NativeWindow parent_window) const {
     83   return parents_.find(parent_window) != parents_.end();
     84 }
     85 
     86 bool SelectFileDialogImpl::CallDirectoryExistsOnUIThread(
     87     const base::FilePath& path) {
     88   base::ThreadRestrictions::ScopedAllowIO allow_io;
     89   return base::DirectoryExists(path);
     90 }
     91 
     92 }  // namespace ui
     93